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amygdaloid

Definitions of amygdaloid
  1. adjective
    shaped like an almond
    synonyms: almond-shaped, amygdaliform, amygdaloidal
    rounded
    curving and somewhat round in shape rather than jagged
  2. noun
    volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits
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    type of:
    volcanic rock
    extrusive igneous rock solidified near or on the surface of the Earth
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